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← ScienceWhich effect emerges when decreasing laser cavity length?
A)Increased longitudinal mode frequency spacing✓
B)Reduced output power due to diffraction
C)Enhanced transverse mode instability issues
D)Decreased gain bandwidth narrowing effect
💡 Explanation
Reduced cavity length shortens the path traveled by the laser light; this increases the longitudinal mode frequency spacing because constructive interference, a resonant standing wave phenomena of highly coherent light can only occur at wider frequency gaps. This alters laser output rather than power reduction, instability or slower gain.
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